MCMCB Pro
T78.119A

T78.119AOther adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified, initial encounter

Billable / specific codeICD-10-CM

T78.119A is a billable, specific ICD-10-CM code for other adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified, initial encounter. It is valid for submission on a claim.

7th character "A" — initial encounter

The appropriate 7th character is to be added to each code from category T78

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

T78.119A does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

T78.119A is named in 10 Medicare coverage policies 10 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A60360Billing and Coding: Allergy Diagnostic Testing
  • A60360Billing and Coding: Allergy Diagnostic Testing
  • A60363Billing and Coding: Allergy Diagnostic Testing
  • A60363Billing and Coding: Allergy Diagnostic Testing

Related codes at this level

Codes that share T78.119. If T78.119A is not quite right, the correct code is usually one of these.

Questions about T78.119A

Is T78.119A a billable ICD-10-CM code?
Yes. T78.119A is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does T78.119A sit in the tabular list?
Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Other and unspecified effects of external causes (T66-T78).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.